[issue22823] Use set literals instead of creating a set from a list

[Roundup Robot]

Roundup Robot added the comment:

New changeset f4e75efdc7f1 by Serhiy Storchaka in branch 'default':
Issue #22823: Use set literals instead of creating a set from a tuple.
https://hg.python.org/cpython/rev/f4e75efdc7f1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22823>
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